Postscript: I guess I'm hitching my wagon to the talent-is-the-new-oil metaphor. I already term places such as NYC "talent refineries". Universities are talent extractors, the energy companies. Places such as Pittsburgh are resource-rich fields where the good stuff is easy (i.e. inexpensive) to mine. The low-hanging fruit is pretty well picked over with demand ever-increasing as new markets develop economically. We've entered an era of difficult-to-extract talent, which requires considerable innovation and investment.